Does you grandmother know the names of spouses for the Cota children?
Ruth, Donald, John, Margaret and is the eldest Ellen?
Also did they all stay in Canada or return to US?
There is a Aug. 13, 1947 NH certificate of intention of marriage for a Ruth Mildred Cota age 42, to William Max Altenbach age 48 , electrician, widowed, - both shown as residing Boston, MA
his 2nd marriage, her first
she is single, registered nursze, born Jefferson, New Hampshire
father John Cota born Vermont, painter, dead - residence Vermont
mother Jane Graham, residence Canada age 70, living born Canada
the marriage took place Nashua, NH Aug. 27, 1947
how John can be residing in VT when he is dead I don't know
also Jane Graham, not Jane Martin but this John Cota is a painter which fits with the 1911 census info for Jean Baptiste Cota
so not sure this is correct Ruth - maybe your grandmother can verify
If it is the right Ruth in 1940 she was houskeeper in the household of William who she later married
she died June 7, 1989 Boston
also found a birth for Mildred Ruth Cota Aug. 23, 1904 Jefferson, Coos, NH, parents John B. Cota and Jennie A, Graham
it says Mildred is 2nd child born to Jennie, it also says John B. born Derby VT age 40, Jennie born Greennock, CAL (looks like?) age 29
** there is a Greenock in Ontario, Canada
the 1911 census has Ruth born Aug. 1905 but pretty close as census are often off by a year
I am still stuck on the MARTIN/GRAHAM name though.
If your mother can confirm if I have the right Ruth it could possibly help with finding more on the Cote family.